Windows 8, What?

So, I keep hearing more and more about Windows 8. Is anyone using it? What do you think? My Computer is "OLD", like 2009 old. It has a Window Experience Index of 5.1, what ever that is. An Intel Core Quad CPU Q8300 2.5 Ghz, 6.0 GB memory, 64 bit OS, and one TB hard disk, about half full.

I'm using Firefox unless I have to get on the VA and then I use Chrome.

Any ideas?